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crypt32: Implement CryptSIPRetrieveSubjectGuid for .cat files.

This commit is contained in:
Juan Lang 2008-10-08 08:58:07 -07:00 committed by Alexandre Julliard
parent a4eb01d2d7
commit dc34bb9eb0
1 changed files with 57 additions and 0 deletions
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57
dlls/crypt32/sip.c
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@ -315,6 +315,7 @@ BOOL WINAPI CryptSIPRetrieveSubjectGuid
/* FIXME, find out if there is a name for this GUID */
static const GUID unknown = { 0xC689AAB8, 0x8E78, 0x11D0, { 0x8C,0x47,0x00,0xC0,0x4F,0xC2,0x95,0xEE }};
static const GUID cabGUID = { 0xc689aaba, 0x8e78, 0x11d0, {0x8c,0x47,0x00,0xc0,0x4f,0xc2,0x95,0xee }};
static const GUID catGUID = { 0xDE351A43, 0x8E59, 0x11D0, { 0x8C,0x47,0x00,0xC0,0x4F,0xC2,0x95,0xEE }};
static const WORD dosHdr = IMAGE_DOS_SIGNATURE;
static const BYTE cabHdr[] = { 'M','S','C','F' };
BYTE hdr[SIP_MAX_MAGIC_NUMBER];
@ -355,6 +356,7 @@ BOOL WINAPI CryptSIPRetrieveSubjectGuid
goto cleanup;
}
TRACE("file magic = 0x%02x%02x%02x%02x\n", hdr[0], hdr[1], hdr[2], hdr[3]);
/* As everything is in place now we start looking at the file header */
if (!memcmp(hdr, &dosHdr, sizeof(dosHdr)))
{
@ -371,6 +373,61 @@ BOOL WINAPI CryptSIPRetrieveSubjectGuid
bRet = TRUE;
goto cleanup;
}
/* If it's asn.1-encoded, it's probably a .cat file. */
if (hdr[0] == 0x30)
{
DWORD fileLen = GetFileSize(hFile, NULL);
TRACE("fileLen = %d\n", fileLen);
/* Sanity-check length */
if (hdr[1] < 0x80 && fileLen == 2 + hdr[1])
{
*pgSubject = catGUID;
SetLastError(S_OK);
bRet = TRUE;
goto cleanup;
}
else if (hdr[1] == 0x80)
{
/* Indefinite length, can't verify with just the header, assume it
* is.
*/
*pgSubject = catGUID;
SetLastError(S_OK);
bRet = TRUE;
goto cleanup;
}
else
{
BYTE lenBytes = hdr[1] & 0x7f;
if (lenBytes == 1 && fileLen == 2 + lenBytes + hdr[2])
{
*pgSubject = catGUID;
SetLastError(S_OK);
bRet = TRUE;
goto cleanup;
}
else if (lenBytes == 2 && fileLen == 2 + lenBytes +
(hdr[2] << 8 | hdr[3]))
{
*pgSubject = catGUID;
SetLastError(S_OK);
bRet = TRUE;
goto cleanup;
}
else if (fileLen > 0xffff)
{
/* The file size must be greater than 2 bytes in length, so
* assume it is a .cat file
*/
*pgSubject = catGUID;
SetLastError(S_OK);
bRet = TRUE;
goto cleanup;
}
}
}
/* Check for supported functions using CryptSIPDllIsMyFileType */
/* max length of szFullKey depends on our code only, so we won't overrun */